Acquisitions (Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions		Jun. 30, 2015	Dec. 31, 2014	Apr. 30, 2014
Business Acquisition [Line Items]
Goodwill		$ 3,253	$ 3,272
National Pump
Business Acquisition [Line Items]
Accounts receivable, net of allowance for doubtful accounts	[1]			$ 44
Inventory				19
Deferred taxes				6
Rental equipment				172
Property and equipment				10
Intangibles	[2]			289
Other assets				1
Total identifiable assets acquired				541
Current liabilities				(25)
Total liabilities assumed				(25)
Net identifiable assets acquired				516
Goodwill	[3]			333
Net assets acquired				849
Accounts receivable, gross				47
Goodwill, amount expected to be deductible for income tax purposes				325
Estimated uncollectible receivables				3
Trench, power and pump | National Pump
Business Acquisition [Line Items]
Goodwill	[3]			321
General rentals | National Pump
Business Acquisition [Line Items]
Goodwill	[3]			$ 12

[1] The fair value of accounts receivables acquired was $44, and the gross contractual amount was $47. We estimated that $3 would be uncollectible.

[2] The following table reflects the estimated fair values and useful lives of the acquired intangible assets identified based on our purchase accounting assessments: Fair value Life (years) Customer relationships$27410 Non-compete agreements156 Total$289

[3] $321 of the goodwill was assigned to our trench, power and pump segment and $12 of the goodwill was assigned to our general rentals segment. The level of goodwill that resulted from the acquisition is primarily reflective of National Pump's going-concern value, the value of National Pump's assembled workforce, new customer relationships expected to arise from the acquisition, and operational synergies that we expect to achieve that would not be available to other market participants. $325 of goodwill is expected to be deductible for income tax purposes. The amount of goodwill that is expected to be deductible for income tax purposes declined during the six months ended June 30, 2015 due to a decline in the fair value of the contingent cash consideration component of the National Pump purchase price due to lower than expected financial performance compared to agreed upon financial targets, as discussed in note 6 to our condensed consolidated financial statements.